diff --git a/src/config/zod-schema.core.ts b/src/config/zod-schema.core.ts
index eca825698a5..46ec2aa4709 100644
--- a/src/config/zod-schema.core.ts
+++ b/src/config/zod-schema.core.ts
@@ -680,6 +680,8 @@ export const ToolsMediaUnderstandingSchema = z
     ...MediaUnderstandingRuntimeFields,
     attachments: MediaUnderstandingAttachmentsSchema,
     models: z.array(MediaUnderstandingModelSchema).optional(),
+    echoTranscript: z.boolean().optional(),
+    echoFormat: z.string().optional(),
   })
   .strict()
   .optional();